Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms^-2.

[g = 10ms^-2]

A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid?

[Density of the cork = 0.25 x 10³kgm^-3, Density of the liquid = 1.25 x 10³kgm^-3]

An object is moving with a velocity of 5m^-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?

If a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump is

Calculate the work done when a force of 20N stretches a spring by 50mm.